1280988874260 has 60 divisors (see below), whose sum is σ = 4018509547668. Its totient is φ = 341597032704.

The previous prime is 1280988874241. The next prime is 1280988874267. The reversal of 1280988874260 is 624788890821.

1280988874260 is a `hidden beast` number, since 1 + 280 + 98 + 8 + 8 + 7 + 4 + 260 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 137145790224 + 1143843084036 = 370332^2 + 1069506^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1280988874267) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 395365317 + ... + 395368556.

Almost surely, 2^{1280988874260} is an apocalyptic number.

1280988874260 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1280988874260 is an abundant number, since it is smaller than the sum of its proper divisors (2737520673408).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1280988874260 is a wasteful number, since it uses less digits than its factorization.

1280988874260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 790733894 (or 790733883 counting only the distinct ones).

The product of its (nonzero) digits is 24772608, while the sum is 63.

The spelling of 1280988874260 in words is "one trillion, two hundred eighty billion, nine hundred eighty-eight million, eight hundred seventy-four thousand, two hundred sixty".